java实现udp客户端

import java.net.*;

public class UdpClient {

public static void main(String[] args) throws Exception {

// 定义服务器地址和端口号

String serverAddress = "127.0.0.1";

int serverPort = 8888;

// 创建数据包对象并设置要发送的消息内容

byte[] sendData = "Hello Server!".getBytes();

DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, InetAddress.getByName(serverAddress), serverPort);

// 创建UDP Socket对象

DatagramSocket socket = new DatagramSocket();

try {

// 向服务器发送数据包

socket.send(sendPacket);

// 接收从服务器返回的数据包

byte[] receiveData = new byte[1024];

DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);

socket.receive(receivePacket);

// 打印服务器返回的消息内容

System.out.println("Received message from server: " + new String(receivePacket.getData(), 0, receivePacket.getLength()));

} finally {

// 关闭socket连接

socket.close();

}

}

}